Contrast ratio results

Black
Contrast ratio	1342:1 (edge: 818:1)
Monitor model
Submitted	19 Aug 2016 14:12 CEST, by 199.116..
Camera model	samsung SM-G920F
Processing remarks
Screen photo	[open image]
Luminance	0.1 cd/m2
Luminance spread	0.03 cd/m2 (2 standard deviations)
Exposure value	–2.94 stops (aim for –2 to –3)
Exposure spread	0.45 stops
Area used for calculation	0.66 x 0.278
Camera settings	Exposure time: 1 ISO: 400 F-number: 1.9 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	135 cd/m2
Luminance spread	8 cd/m2 (2 standard deviations)
Exposure value	–1.51 stops (aim for –2 to –3)
Exposure spread	0.09 stops
Area used for calculation	0.66 x 0.278
Camera settings	Exposure time: 1/498 ISO: 400 F-number: 1.9 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	0.17 cd/m2
Luminance spread	0.15 cd/m2 (2 standard deviations)
Exposure value	–2.22 stops (aim for –2 to –3)
Exposure spread	1.43 stops
Area used for calculation	0.371 x 0.495
Camera settings	Exposure time: 1 ISO: 400 F-number: 1.9 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0

The luminance values in cd/m2 are not very reliable, since camera sensitivities can easily differ up to 50% from their nominal value. Typically, the real luminance is 30% lower than this number. The area used for calculation is chosen such that it corresponds to a viewing angle of ±14° horizontally and ±10.5° vertically, which is equivalent to viewing the screen from a distance of about 1.5 times the diagonal size.

Unfortunately, there is a lot of variation in how cameras use EXIF settings. If photos from your camera your produce unusable results, try coming back in a few days. I review submitted pictures regularly and try to fix problems.